diff --git a/pyghmi/ipmi/oem/lenovo/config.py b/pyghmi/ipmi/oem/lenovo/config.py
index f51eae45..1badb6d5 100644
--- a/pyghmi/ipmi/oem/lenovo/config.py
+++ b/pyghmi/ipmi/oem/lenovo/config.py
@@ -305,6 +305,10 @@ class LenovoFirmwareConfig(object):
                     readonly = setting.get('gray-if')
                     if readonly:
                         readonly = _convert_syntax(readonly)
+                    else:
+                        access = setting.get('access')
+                        if access == 'readonly':
+                            readonly = 'true'
                     possible = []
                     current = None
                     default = None
@@ -485,10 +489,6 @@ class LenovoFirmwareConfig(object):
         for option in options.keys():
             if options[option]['new_value'] is None:
                 continue
-            if options[option]['current'] == options[option]['new_value']:
-                continue
-            if options[option]['pending'] == options[option]['new_value']:
-                continue
             if options[option]['readonly']:
                 errstr = '{0} is read only'.format(option)
                 if options[option]['readonly_why']:
@@ -496,6 +496,10 @@ class LenovoFirmwareConfig(object):
                         ','.join(sorted(options[option]['readonly_why'])))
                     errstr += ea
                 raise pygexc.InvalidParameterValue(errstr)
+            if options[option]['current'] == options[option]['new_value']:
+                continue
+            if options[option]['pending'] == options[option]['new_value']:
+                continue
             if isinstance(options[option]['new_value'], six.string_types):
                 # Coerce a simple string parameter to the expected list format
                 options[option]['new_value'] = [options[option]['new_value']]
diff --git a/pyghmi/ipmi/oem/lenovo/handler.py b/pyghmi/ipmi/oem/lenovo/handler.py
index 79291130..480b8c26 100755
--- a/pyghmi/ipmi/oem/lenovo/handler.py
+++ b/pyghmi/ipmi/oem/lenovo/handler.py
@@ -528,7 +528,7 @@ class OEMHandler(generic.OEMHandler):
                                                     data=(id_,))
                 except pygexc.IpmiException:
                     continue  # Ignore LEDs we can't retrieve
-                status = led_status.get(ord(rsp['data'][0]),
+                status = led_status.get(bytearray(rsp['data'][:])[0],
                                         led_status_default)
                 yield (name, {'status': status})
 
@@ -821,9 +821,12 @@ class OEMHandler(generic.OEMHandler):
                 data=(0x01, 0xc5, 0x00, 0x00))["data"][1:]
             if not ipv6_addr:
                 return
-            ipv6_prefix = ord(self.ipmicmd.xraw_command(
+            rspdata = self.ipmicmd.xraw_command(
                 netfn=0xc, command=0x02,
-                data=(0x1, 0xc6, 0, 0))['data'][1])
+                data=(0x1, 0xc6, 0, 0))['data']
+            ipv6_prefix_ba = bytearray(rspdata)
+            ipv6_prefix = ipv6_prefix_ba[1]
+
             if hasattr(socket, 'inet_ntop'):
                 ipv6str = socket.inet_ntop(socket.AF_INET6, ipv6_addr)
             else:
diff --git a/pyghmi/ipmi/oem/lenovo/inventory.py b/pyghmi/ipmi/oem/lenovo/inventory.py
index 6f246e85..248b0e60 100755
--- a/pyghmi/ipmi/oem/lenovo/inventory.py
+++ b/pyghmi/ipmi/oem/lenovo/inventory.py
@@ -68,7 +68,7 @@ def parse_inventory_category(name, info, countable=True):
 
     cur = 0
     if countable:
-        count = struct.unpack("B", raw[cur])[0]
+        count = bytearray(raw)[cur]
         cur += 1
     else:
         count = 0
@@ -127,7 +127,7 @@ def parse_inventory_category_entry(raw, fields):
             continue
 
         if (field.fmt[-1] == "s"):
-            value = value.rstrip("\x00")
+            value = value.rstrip(b'\x00')
         if (field.mapper and value in field.mapper):
             value = field.mapper[value]
         if (field.valuefunc):
diff --git a/pyghmi/ipmi/private/spd.py b/pyghmi/ipmi/private/spd.py
index 5acf45a4..c00de3f2 100644
--- a/pyghmi/ipmi/private/spd.py
+++ b/pyghmi/ipmi/private/spd.py
@@ -736,7 +736,7 @@ class SPD(object):
         self.info['serial'] = hex(struct.unpack(
             '>I', struct.pack('4B', *spd[122:126]))[0])[2:].rjust(8, '0')
         self.info['model'] = struct.pack('18B', *spd[128:146]).strip(
-            '\x00\xff ')
+            b'\x00\xff ')
 
     def _decode_ddr4(self):
         spd = self.rawdata